"""MiroFish backend entry point."""

import os
import sys

# Force UTF-8 on Windows console before importing anything that might write to
# stdout/stderr; otherwise non-ASCII characters render as mojibake.
if sys.platform == 'win32':
    # Make sure Python itself uses UTF-8.
    os.environ.setdefault('PYTHONIOENCODING', 'utf-8')
    # Reconfigure the standard streams to UTF-8.
    if hasattr(sys.stdout, 'reconfigure'):
        sys.stdout.reconfigure(encoding='utf-8', errors='replace')
    if hasattr(sys.stderr, 'reconfigure'):
        sys.stderr.reconfigure(encoding='utf-8', errors='replace')

# Add the project root to sys.path so the ``app`` package resolves.
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))

from app import create_app
from app.config import Config


def main():
    """Validate configuration and start the Flask development server."""
    errors = Config.validate()
    if errors:
        print("配置错误:")
        for err in errors:
            print(f"  - {err}")
        print("\n请检查 .env 文件中的配置")
        sys.exit(1)

    app = create_app()

    # Resolve runtime host/port from the environment.
    host = os.environ.get('FLASK_HOST', '0.0.0.0')
    port = int(os.environ.get('FLASK_PORT', 5001))
    debug = Config.DEBUG

    app.run(host=host, port=port, debug=debug, threaded=True)


if __name__ == '__main__':
    main()